In my area TATA is providing connections over pppoe ( ppp on ethernet ) . The guys who come for install makes a pppoe connection in control panel which you can dial like normal dialup connection . But as everything is on ethernet you can always sniff for arp packets to see which IP ranges are accessible from your place . First day i got connection i fired up wireshark and got some 172.*.* ip ranges which was sending lot of arp packets so by manually giving this ip to my lancard i was able to scan all 210.211.*.* ip ranges without even dialing in my pppoe connection . Now just a few ip range scans for proxy ports 6588,3128,1080 gives lot of free internet proxies 
. This works even if your account is expired i guess . I assume this kind of jhol is even possible on every other isp providing pppoe connections . I also have many tricks for sify ( 2-3 years no renewal ) but they are fixed somewhat and i have stopped using sify for now . I will post about them later sometime .Sorry for posting here but we dont have backroom for tata yet .Perhaps now some people might understand why i like tata so much .
. This works even if your account is expired i guess . I assume this kind of jhol is even possible on every other isp providing pppoe connections . I also have many tricks for sify ( 2-3 years no renewal ) but they are fixed somewhat and i have stopped using sify for now . I will post about them later sometime .Sorry for posting here but we dont have backroom for tata yet .Perhaps now some people might understand why i like tata so much .